1. Features

 8bits micro-controller with Pipe-line structured 8051 compatible instruction set

 Flash ROM: 16K Bytes

 RAM: internal 256 Bytes, external 1280 Bytes

 Operation Voltage: 2.7V - 5.5V

 Oscillator:

- Internal RC: 27MHz (±2)

- External crystal oscillator: 32.768kHz

 28pin: 25 CMOS bi-directional I/O pins

20pin: 17 CMOS bi-directional I/O pins

 Built-in pull-up resistor for input pin

 Three 16-bit timer/counters T2, T3 & T4

 20 channels Touch Key input

 Built-in Touch Key comparison voltage:

1V, 1.5V, 2V, 2.5V

 7 COM 16 SEG LED drive

 Touch Key sharing with LED drive

 Powerful interrupt sources:

- Timer2, 3, 4

- INT0, INT1, INT2, INT4

- EUART

- Touch Key

- TWI

 EUART with Baud-rate generator

 TWI communication interface

 Built-in 2 channels programmable tone generator

 CPU Machine cycle: 1 oscillator cycle

 Watch Dog Timer (WDT)

 Flash Type

 Package: SOP28

SOP20

SOP16